code: def gather_and_hash(*inputs):
      import hashlib
      import time
  
      output = hashlib.sha256("-".join(inputs).encode()).hexdigest()
      sleep_duration = int(output, 16) / 2**256 / 100
      time.sleep(sleep_duration)
      return output
  
file_path: ray/python/ray/workflow/tests/test_complex_workflow.py
imports: import pytest
  import random
  import ray
  from ray import workflow
label_desc: Use image node_id 3 for calling a global function with example usage: gather_and_hash() and returns: output